669535 has 8 divisors (see below), whose sum is σ = 807840. Its totient is φ = 532704.

The previous prime is 669527. The next prime is 669551. The reversal of 669535 is 535966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669535 - 2³ = 669527 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 669535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609 + ... + 1981.

It is an arithmetic number, because the mean of its divisors is an integer number (100980).

2⁶⁶⁹⁵³⁵ is an apocalyptic number.

669535 is a deficient number, since it is larger than the sum of its proper divisors (138305).

669535 is a wasteful number, since it uses less digits than its factorization.

669535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737.

The product of its digits is 24300, while the sum is 34.

The square root of 669535 is about 818.2511839283. The cubic root of 669535 is about 87.4831532192.

The spelling of 669535 in words is "six hundred sixty-nine thousand, five hundred thirty-five".